Restriction enzymes

A) exist in bacteria to restrict the growth of viruses.
B) cut double-stranded DNA at specific sites.
C) produce "sticky ends" that can bind foreign DNA.
D) facilitate inserting foreign DNA into vector DNA.
E) All of the answer choices describe restriction enzymes.

Restriction Enzymes

Proteins used to cut DNA at specific sequences, essential tools in molecular biology for gene cloning and DNA modification.

Double-Stranded DNA

The structure of DNA in which two linear strands run in opposite directions (antiparallel) and are wound around each other, much like a twisted ladder, forming the characteristic double helix.

Sticky Ends

Single-stranded overhangs resulting from the action of restriction enzymes on DNA, which can be used to join DNA fragments together.